Add compressed texture capabilities for GPU devices

include/gpu/GrTypes.h

 
 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 
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     kStencil_GrGLBackendState          = 1 << 6,
     kPixelStore_GrGLBackendState       = 1 << 7,
     kProgram_GrGLBackendState          = 1 << 8,
     kFixedFunction_GrGLBackendState    = 1 << 9,
     kMisc_GrGLBackendState             = 1 << 10,
     kPathRendering_GrGLBackendState    = 1 << 11,
     kALL_GrGLBackendState              = 0xffff
 };
 
 /**
+ * The compressed texture formats that are supported
+ */
+enum GrCompressedFormat {
+    kUncompressed_GrCompressedFormat = -1,
+    kETC1_GrCompressedFormat         =  0,
+
+    kLast_GrCompressedFormat = kETC1_GrCompressedFormat
+};
+static const size_t kCompressedFormatCount = kLast_GrCompressedFormat + 1;
+
+/**
  * This value translates to reseting all the context state for any backend.
  */
 static const uint32_t kAll_GrBackendState = 0xffffffff;
 
 ///////////////////////////////////////////////////////////////////////////////
 
 #endif